Filling machine



Jan. 12 1926. '1569360 J. PURVIS, JR

' FILLING MACHIN Filed Feb. 11, 1924 1N VENTOR Bmww BY BY-M.

` A TTORNE YS Patented Jan. 12, 1926.

UNITED STATES 1,569,300 PATENT oFF-ice.

yJOHN PURVIS, JR., OF. HICAGO, '=II.|LINOIS.

FILLING Application l-led February To all whom t may concern:

Be itlrnown-zthat I, JOHN Puavrs, Jr., a citizen ofthe .United States, and a resident otGhicago, in the 'county of Cook andState ofv Illinois, have invented a new and useful lfmprovementin `Filling Machines, of which the following is a full, clear, and exact description.

fMy invention relates to improvement-s in iilling .maehmes, and moreparticularly to .those machines that are designed1 totill conerated by pressure applied te the i'luid material' itself, and which will deliver a predetermined quantity of the fluid.

MACHINE.

11,1924. seriai 1ra-mma.

case of semiplastic materials, suchv as grease, lard', etc., these ymaterials'are heated in order tobr'ingl them into a iuifd condition.

"Connected to the :supply `pi-pe arewunits "such as fth-at 1 shown in 'Figure l1. v[In tli-is figure it 1willbeeliserved that branchpipes 2,-andv2" lead :to valve easings Sgand' respectively, vthese vali-ve fcasi-ngs being each provided with a ,three-way -valve such las thoseshown atl 4. The valve f raisin-g3l communicates With'thebottom'of a cylinder-'5, tl-ie valve easing 3 communicating with'a .similiar cylinder'f. The cylinders 5 and-15 are associated Atogether,fand lmay be held in spaced lrelation by a suitable fframe such l asthat; shown at GA in 'Figure 1. Within the l cylinder- 51 is apiston 7, and this piston-has i pi-votalliy secured thereto a' rack 8. 1 lnthecyl'inder 5" is a, piston-'77. which-vis l pivotally-eonnected to the rack 8 similar l -to `A`therael'r. The raeksS and 8 engage A further object of my invention is tol a pinion r-9 which is mounted at V10 above Aprovide a device which can be readily ad- `justed to deliver varying amounts of fluid at will.

A'urtlier object of my invention is to provide a device which is balanced in such a mannertliat it may be operated at a minimum pressure and will thus serve for lling receptacles with Huid which will not stand a high pressure.

A 'further object of my invention is to provide a device of the type described in which the action may be controlled, i. e., hastened or retarded by a check valve placed inthe pressure line.

Other objects and advantages will appear in the following specification, and the novel features of the invention may be particularly pointed out in the appended claims.

'My invention is illustrated in the accompanying drawings, forming part of this application, in which Figure 1 is a sectional view through one of the units,

Figure 2 is a plan view showing a plural- Y ity of units arranged in multiple, and

Figure 3 is an enlarged sectional view along the line 3 3 of Figure 1, part of the pinion being shown in plan view.

In carrying out my invention I make use of a supply pipe line 1 extending from any suitable source of supply (not shown). The liquid inthe pipeline 1 may be any liquid or semi-liquid, and pressure may be applied to it by any suitable pressure means. 1n

the cylinders and 5.

'Ehe-racks 8" and 8 `a'refheld in contact withthep-inion -9 by spring pressed/blocks 11, each oitY which bears a roller-1:2. `As will be seen'in-Figure 3', the block-12 is slidably disposedin a'frame :13, carried by the'support 6, this `ramefbeing slotted at 14 to permit the movement of the block. A spring 15v `bears yon vthe block and the tension of the spring may beV regula-ted by means of a screw 1'6. v

In vFigure 2 v I have shown a number of these uni-ts larranged in multiple and being served by a common pipe line. A return pipe17 is provided leading to the source of supply `(not-shown) In'this return pipe is a valve- 18.

From the foregoing description of the various parts of the device, the operation thereof'may be readily understood. When pressure'is applied to theliquid in the pipe 1,- it. will pass into. :the laterally ,extending pipes 2er 2,dependingupon the position of the'valves'4 or'4". Thus in Figure 1 the liquid would have 'passed rthe valve 4 and have filled the cylinder 5', pushing "thepiston 7 "i upwardly, and turningthe pinion 9 soy as to force the rack`8" downwardly and to drive the pistony 7 kahead 'of it, thus forcing out the contents of 'the cylinder 5 through the open. valve4 into the receptacle 19. Wlien' the-piston 7 reaches lthe bottom of its travel, then the action will stop. A measured quantity of fluid will therefore CTI be delivered to the receptacle 19. The valves 4 and i are rotary valves, and are connected together by means of the arms 20 and 20', and a link 21, connecting the two arms. When it is desired to lill the other receptacle 22, it is only necessary to move the link 2l from the position shown in full lines to the right in Figure 1l. This will close the valve il and open the valve t, and the pressure will then be exerted on the piston 7. This piston will then risc and through the medium of the pinion 9 will force the rack 8" and the piston 7 downwardly, thus forcing the contents of the cylinder 5 out into the receptacle 22.

When it is desired to change the amount ot liquid delivered the upper ends of the racks 8 and 8 may be swung outwardly against the tension of the springs l5, so as to be disengaged from the pinion 9. The pistons and 7 may then be moved to the proper position to deliver a predetermined amount, and the racks may then be brought into engagement with the common pinion 9.

As will be seen from Figure 2, a number of these units may be arranged in multiple to be actuated by a common supply pipe. Thel return pipe 17 is provided with a valve l8r1 so that in case it is desired to speed up thell action, the valve may be turned so as tol cause a back pressure, and thus tend to accelerate the action of the device.

The apparatus is simple in construction. It will be observed that each of the units is balanced, that is to say, when the fluid is admitted to one cylinder, it tends to cooperate with the fluid in the other cylinder for actuating the device, for it will be observed that as the fluid in one cylinder forces the piston up, the natural gravity of the fluid in the other cylinder will tend to cause the vacuum or decrease ot pressure in the cylinder which is emptying, and this will aid in the operation of the device. Thus the device may be used for liquids which will not stand much pressure.

One advantage of the device is that the pistons always keep the cylinders clean. There is no residue ot liquid clinging to the walls, which is often the case where the l'illing ot the receptacle is accomplished by merely permitting the weight of the liquid to act. In the present device, there is a positive cleaning` oi the cylinders, so that they are always in condition for delivering precisely the amount at each reciprocation.

l claim:

l. The combination of a pair of cylinders, a piston for each cylinder, a three-way valve associated with each cylinder, a supply pipe communicating with each of said valves, one ot said valves being open when the other is shut, a rack secured to each piston, a pinion disposed between and engaging both racks, whereby thermovement of one piston will cause the downward movement oi the other piston, and spring pressed means for holding said racks in engagement with said pinion. said raclrs being movable against the spring tension to bring them out of engagement with said pinion at will.

2. The combination of a pair of cylinders, a piston in each cylinder, a rack having one end pivotally secured to each piston, a pinion, spring means for holding each of said racks in engagement with said pinion, a three-way valve connected at the bottom of cach cylinder, a supply pipe communicating with both ot said valves, means for simultaneously opening either of said valves and closing the other, and a discharge outlet cminnnnicating with each of said valves.

3. The combination ot a pair of cylinders, a piston in each cylinder, a rack having one end pivotally secured to each piston, a pinion. spring means for holding each of said racks in engagement with said pinion, a three-way valve connected at the bottom of each cylinder, a supply pipe communicating with both of said valves, means for simultaneously opening either of said valves and closing the other, a discharge outlet communicating with each ot said valves, a re- `turn pipe communicating with said iirst named pipe, and a valve in said return pipe tor restricting the flow of liquid theren through.

The combination with a supply pipe, or' a plurality of units communicating with said supply pipe. each of said units comprising a pair ot cylinders, pistons in said cylinders` a three-way valve disposed at the bottom ot each cylinder communicating with said supply pipe, means connectingsaid pistons for translating an upward movement of one piston into a downward movement of the other piston, means for closing one valve of each unit while opening the other valve, a return pipe communicating with the supply pipe, and al valve in the return pipe for restricting the flow.

si. The combination with a supply pipe, of a plurality ot units communicating with said supply pipe, each of said units comprising a pair of cylinders, pistons in said cylinders, :i Jdirec-way valve disposed at the bottom ot each cylinder communicating with said supply pipe, means connecting said pistons for translating an upward movement of one piston into a downward movement of the piston of its pair, means for closing one valve of each unit while opening the other valve, and means tor regulating the speed ot the pistons in all ot' said units simultaneously.

JOHN P'URVIS, Jn. 

